Vacuum tube



Jan. 16,1940. K, B 2,187,172

VACUUM TUBE Filed Sept. 28, 1937 INVENTOR. KINJIRO OKABE Patented Jan.16, 1940 Lil 'vAo'wM ime Kinjiro Okabe, Ashiy'a, Japan, assign'ort'o'Radio Corporation of America; New York, N. Y., a corporation ofDelaware 7 Application September 28, 1937, Serial No. 166,214

In Japan December 6, 1936 Myinventionrelates to-vac'uum tubes havin aparticular structure'to which a magnetic field is applied. k I

The main object of my invention ist'o provide qva'cuum tubes or higherefiiciency and greater output, producing ultra short wave or micro waveoscillations.

The invention may be understood more readily from the following detaileddescription when 10 considered 'in connection withthe accompanyingdrawing and those features of the invention which are believed to benovel and patentablerwill be pointed out in the claims appended heretoIn the, drawing Figure l showsan end view of an 15 electron dischargedevice made according to'my invention; Figure 2 is a side view of Figure1; Figures'3 andfi are end and side views of a modification of myinvention; Figure 5 is a schematic diagram of an electron dischargedevice made 20 according to my invention andits associated circuit;Figures 6 and '7 are views of further modifications of an electrondischarge device made according to my invention; and Figures 8 and 9"show still further modifications of an electron 55 discharge device madeaccording tomy invention.

Referring now more in detail to the drawing,

it will be seen that the like reference characters are being utilizedthroughout the drawing to' designate the like parts, that is to say, A,F and S 30 designate respectively anodes on which higher voltages are tobe impressed, thermionic cathodes to emitelectrons, and oscillatingelectrodes kept at zero or negative potentials and to be connected tooscillation circuits, The electrodes are posi- 35 tioned within anexhausted envelope E. T1 to T5 designate terminals of all electrodeswhile H designates thedirections toward which magnetic fields to. beapplied are directed. The magnetic field coil M produces a magneticfield parallel to 40 the cathode and between the cathode and anode.

oscillation circuit and a magnetic field coil. In

50 the state of non-oscillation, if an intensity in the magnetic fieldexceeds a critical value there may flow substantially no current in A.When the length of the oscillation circuit, voltages, and hot cathodecurrent are adjusted, there may arise II oscillations the wave lengthsof which are mostly 9 Claims. I (CIQ250-27) in.

' 'determinedby only and at the same time the current may flow both in Sand A. The oscillators having such characteristics operate with highjefiicien'cy. Figures 6 and '7 show an instance in which the Y electrodeSis divided into rings, while Fig. 8 shows an instance in which threegroups of such electrodes as shown in Fig. 'l, are arranged side by s dein the axial direction for the purpose-oi increasing the output. Fig. 9shows a vacuum tube 10 of-water cooling type arranged according to myinvention. G are the glass walls; By connecting the wall directly to theanode A the saidanode may be cooled directly from without therebyafior'ding a great output. The oscillation circuits may be formed byconnecting between T1 and T2, and between T1 and T2. Y

Summing up, vacuum tubes according to my invention have such featuresthat they will operate with a high efficiency, generating ultrashortwaves or micro waves of great output. It will .be readily understoodthat vacuum tubes of my invention may also be employed for super-vregenerative receiving tubes of ultra-short waves or micro waves.

,What I claim as new and desire to secure by Letters Patent of theUnited States is:-

'1. An electron discharge device including a thermionic cathode, acylindrical anode surrounding and coaxial with said cathode, a pair ofout put electrodes positioned adjacent one end of said cylindrical anodeand closing the end of said anode and lying in a plane transverse tothe'axis of said cathode and anode and means for producing only a singlemagnetic field parallel to and between said cathode and cylindricalanode.

2. An electron discharge device including a thermionic cathode, acylindrical anode surrounding and coaxial with said cathode,apluralityofsegmental output electrodes positioned adjacent each end ofsaid cylindrical anode and lying in planes transverse to the cathode andsaid anode, and

means for producing only a single magnetic field to the cathode and saidanode, and means for producing only a single'magnetic field parallel toand between said cathode and cylindrical anode.

4. An electron discharge device having-a ther- 5 mionic cathode and acylindrical anode surrounding and coaxial with said cathode, a pair ofringlike output electrodes positioned adjacent and closing the end ofsaid cylindrical anode and lying in a common plane transverse to thecathode and said anode, and an electromagnetic field producing coilsurrounding and coaxial with said cathode and cylindrical anode, forproducing a single magnetic field parallel to and between said cathodeand cylindrical anode.

5. An electron discharge device having a thermionic cathode and acylindrical anode surrounding and coaxial with said cathode, a pair ofringlike output electrodes positioned adjacent each end of saidcylindrical anode and closing the ends of said cylindrical anode andlying in planes transverse to the cathode and said anode, and anelectromagnetic field producing coil surrounding and coaxial with saidcathode and cylindrical anode, for producing a single magnetic fieldparallel to and between the cathode and the anode.

6. An electron discharge device having an elongated thermionic cathode,a plurality of cylindrical anodes surrounding and coaxial with saidcathode and disposed longitudinally along said cathode, and a pluralityof output electrodespositioned adjacent the ends and between saidcylindrical anodes, said output electrodes lying in planes transverse tothe axis of the cathode and circular anodes, and means for producing amagnetic field parallel to and between said cathode and cylindricalanodes.

7 An electron discharge device having an elongated thermionic cathode, aplurality of cylindrical anodes surrounding and coaxial with saidcathode and displaced longitudinally along said cathode, and a pluralityof output electrodes positioned adjacent the ends and between saidcyllndrical anodes, said output electrodes lying in planes transverse tothe axis of the cathode and circular anodes, and means for connectingsaid output electrodes in parallel and other means for connecting saidcircular anodes in parallel, and means for producing a magnetic fieldparallel to and between said cathode and cylindrical anode.

8. An electron discharge device including a thermionic cathode, a,cylindrical anode surrounding and coaxial with said cathode, a pair ofoutput electrodes positioned adjacent each end of said cylindrical anodeand closing the ends of said anode and lying in planes transverse to theaxis of said cathode and anode, and means for producing only a singlemagnetic field parallel to and between said cathode and cylindricalanode, and an oscillating output circuit connected between said outputelectrodes.

9. An electron discharge device comprising a thermionic cathode, acylindrical anode surrounding and coaxial with said cathode, a pluralityof segmental output electrodes positioned adjacent the end of saidcylindrical anode and lying in a plane transverse to the cathode andsaid anode, an output circuit connected between said output electrodes,and a connection between said output circuit and said cathode, and meansfor biasing said output electrodes negatively with respect to saidcathode and said circular anode positively with respect to said cathode.

KINJIRO OKABE.

